I will write more about the creation of rdifffs at a later date: in
particular my choice of implementation language, but I don't want to clutter
up this announcement with all that. Suffice to say, I started writing a "quick
tool" nearly a year ago, and I have become increasingly desperate to announce
it.

At present, rdifffs should be considered alpha quality software. It can
browse my real-world backup, albeit slowly, and with several metadata bugs.
This is more than archfs can manage. It can read files from the most recent
backup, and most files from incremental backups, but not all.